Furnace



'L. J CLOSSEY.

FURNACE.

APPLICATION FILED NOV 11. 1919.

Patented Dec. 14,1920.

5 SHEETS-SHEET 4- IIVVENTOR L JCZOJJE) WITNESSES A TTORNEYS L. J. CLOSSEY.

FURNACE. APPLICATION FILED NOV-11,1919- Patented Dec. 14, 1920.

5 SHEETS-SHEET 5.

INVENTOR 4 J c; a flsfr WITNESSES I A TTORIVE VS UNITED STATES PATENT OFFICE.

LEONARD JOSEPH CLOSSEY, 0F DETROIT, MICHIGAN.

FURNACE.

Application filed November 11, 1919. -Seria1 No.p337,179.

To all whom it may concern:

Be it known that I, LEONARD J. CLossEY, a citizen of the United States, and a resident of the city of Detroit, in the county of Wayne and State of Michigan, have'invented a new and Improved Furnace, of which'the following is a full, clear, and exact description.

This invention relates to improvements in furnaces, and more particularly tohot'air furnaces, an object of the invention being to provide a furnace composed of sections secured together and forming. a novel arrangement of air passages and smoke passages whereby a maximum of highly heated radiating surface is utilized to heat the'air and thus economize in fuel used.

A further object is to provide a furnace having a free draft without danger of soot or ash accumulating to interfere with the draft or the radiation of heat.

A further object is to provide a furnace designed to burn hard fuel and which will most efficiently perform the functions for which it is intended.

With these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully described and pointed out in the claims.

In the accompanying drawings:

Figure 1 is a view in verticalsecti'on illustrating my improved furnace.

Fig. 2 is a view in vertical section taken at right angles to Fig. 1.

Fig. 3 is a view in horizontal section on the line 3-3 of Fig. 2.

Fig. 4 is a view in elevation of the upper dome C.

Fig. 5 is a view in elevation partly broken away, of the lower dome B.

Fig. 6 is a top plan view of the lower dome B.

Fig. 7 is a view in section on the line 7-7 of Fig. 2. i

Fig. 8 is a bottom plan view of the upper dome C.

Fig. 9 is a view in section on the line 9-9 of Fig. 6.

My improved furnace comprises in the main, a base section A with sections B, C,

and D located above the same, the upper section D constituting a smoke dome or hood and capping-the said sections of the furnace.

A casing E incloses the furnace above described and forms therewith an air space, and is provided with any desired arrangement of air flues F, while a smoke pipe G extends through the upper end of the casing and communicates with the smoke outlet H of the hood D.

A horizontal partition ring J divides the air space around thefurnace into upper and lower compartments K and L, and is mounted on supports 1 projecting from the section B.

The base A constitutes a casting supporting a grate 2, dividing the base into an upper fire pot 3 and a lower ash pit 4.

The grate 2 is preferably of the shaker bar type having links 14 connecting the same with a shaker bar 5 and the latter projecting through the base A and operated by a lever 16, although it isof course to be understood that my invention is not limited to any particular construction of grate or manner of operating the same, as I may employ any grate desired in my improved furnace.

The ash pit 4 is made with a hinged door 6 to permit the removal of ashes.

The upper edge of base A is made with a groove 8 receiving the lower edge of the lower section B, and the latter is also a casting, having a fuel entrance 8' and a hinged fuel door 9 secured in closed position by a latch 7.

It is of course to be understood that the doors 6 and 9 will have any desired arrangement of drafts or dampers to suit the trade.

The section B comprises a cylindrical wall 13 and a plurality of air passages 12 opening at their lower ends into the air compartment L and extending inwardly and upwardly toward the center of the section and forming a dome b for the combustion chamber. Smoke passages 10 extendbetween certain of the air passages 12 into the space 11, formed by the air passages 12 and the wall 13. The wall 13 rests in groove 8 in the top of the base. The section C comprises a cylindrical wall 15, a central chamber 23 having open the air passages 12 of the section B, and from which chamber lead upwardly and outwardly extending air passages C opening into the upper air compartment K, Smoke passages 19 extend from the space 11*, formed by the wall 15 and air passages and chamber 23 between the said air passages. The wall 15 rests in a groove 13 in the wall 13 of the section B and the wall 0 of the chamber 23 rests in a groove 12' in the dome b of said section. The upper end of the air passages G has a flange 17 which rests in a groove 15 in the top of the wall 15. The spaces 11 and 11 form a smoke pas sage. Upon the top of the chamber 23 and between the air passages C radially disposed webs 20 are arranged for deflecting the smoke and gases. A hood D having a smoke outlet H, rests in a groove formed in the upper edge of the section G.

A conical deflector 21 is supported below the smoke outlet H, and is provided with a central opening 22 to allow ash and soot to fall therethrough and not collect in the deflector. v

The several castings are preferably formed with any desired arrangement of radial ribs 24 to strengthen the structure and prevent cracking and warping.

If desired the base A may have an air passage 25 connecting the ash pit with the upper portion of the fire box.

The operation is as follows The smoke and gases from the fire box 3 pass upwardly into contact with the lower surface of dome 7) and thence through the passages 10 into the space 11 contacting with the outer surface of dome b and also the,

outer surface of dome 0. The smoke and{ gases then pass through the passages .19 and over the upper surface of dome c and thence;

their wall surfaces indirect contact with thel heat and hence the maximum of heat are radiated into the air which is as follows:

From the air space L the air enters the! air passages 12 of section B and passes up; into the air chamber '28. The air then passes out of dome 0 into the air space K and then into the fiues F and is conveyed to in its passage;

' any desired point for use.

' The air therefore comes into contact with. the radiating surfaces of the sections as well as with the walls of the outer parts of the furnace, and as all of the section walls are in direct contact with the smoke and gases they are highly heated and the heat of the fuel is untilized to the maximum degree.

The furnace section can be readily as sembled and replaced when worn and by .reason of the arrangement of smoke pasunitsi sages and fines a free draft is had, yet the smoke and gases are deflected and held back sufliciently to attain the maximum of radlation, by reason of this arrangement of air chambers and passages formed by the sections.

Various slight changes might be made in the general form of the parts described without departing from my invention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. A furnace comprising a plurality of superimposed sections, and a casing surrounding the sections and forming therewith an air space divided into upper and lower compartments, the lowest section having a fire box and ash pit, the next upper section having a plurality of air passages extending from the lower air compartment inwardly toward the center of the section, and forming a dome for the combustion chamber, and smoke passages extending between the air passages, the second upper section having a central air chamber into which the said air passages open, a plurality of outwardly extending air passages leading from the said chamber to the upper air compartment, and smoke passages extending between the air passages, the third upper section being in the form of a hood and having a smoke outlet.

2. A furnace, comprising a plurality of superimposed sections, and a casing sur- {rounding the sections and forming there- ,Iwith an air space dividedinto upper and lower compartments, the lowest section having a fire box and ash pit, the next upper around the deflector 21 and out the flue H It will thus be noted that the air chamberst'? formed by the sections C and B have all off. 45

ection having a plurality of air passages extending from the lower air compartment inwardly toward the center of the section and forming a dome for the combustion -chamber, and smoke passages extending between theair passages, the second upper see- I; ,tion having a central air chamber into which the said air passages open, apluraIity of outwardly extending air passages leading from the air chamber to the upper air compartment, and smoke passages extending between the air passages, the third upper section being in the form of a hood and having an inverted and centrally apertured conical deflector.

3. A furnace, comprising a plurality of superimposed sections, and a casing surrounding the sections and forming therewith an air space divided into upper and lower compartments, the lowest section having a fire box and ash pit, the next upper section having a plurality of air passages ex tending from the lower air compartment inwardly toward the center of the section and forming a dome for the combustion chamment, smoke passages extending between her, and smoke passages extending between the air passages, and radial disposed deflecthe air passages, the second upper section tors on the top of the air'chamber between 10 having a central air chamber into which the the air passages, the third upper section be- 5 said air passages open, a plurality of outing in the form of a hood and having a wardly extending air passages leading from smoke outlet and inverted conical deflector. the air chamber to the u per air compart- LEONARD JOSEPH CLOSSEY. 

